[PATCH 0/1] MR6002: secur32: Implement the NameDisplay name format of the GetUserNameExW method

[Egor Poleshko (＠somedevfox)]

This merge request implements the third name format ("[NameDisplay](https://learn.microsoft.com/en-us/windows/win32/api/secext/ne-secext-extende...)") of the GetUserNameExW method.

[PATCH 1/1] secur32: Implement the NameDisplay name format of the GetUserNameExW method

[Egor Poleshko]

From: Egor Poleshko

---
 dlls/ntdll/unix/env.c          |  1 +
 dlls/ntdll/unix/loader.c       | 11 ++++++-----
 dlls/ntdll/unix/unix_private.h |  1 +
 dlls/secur32/secur32.c         | 14 +++++++++++++-
 4 files changed, 21 insertions(+), 6 deletions(-)

diff --git a/dlls/ntdll/unix/env.c b/dlls/ntdll/unix/env.c
index 36949b905fb..4edd740774a 100644
--- a/dlls/ntdll/unix/env.c
+++ b/dlls/ntdll/unix/env.c
@@ -1099,6 +1099,7 @@ static void add_dynamic_environment( WCHAR **env, SIZE_T *pos, SIZE_T *size )
     add_system_dll_path_var( env, pos, size );
     append_envA( env, pos, size, "WINELOADER", wineloader );
     append_envA( env, pos, size, "WINEUSERNAME", user_name );
+    append_envA( env, pos, size, "WINEDISPLAYUSERNAME", display_user_name);
     append_envA( env, pos, size, "WINEDLLOVERRIDES", overrides );
     if (unix_cp.CodePage != CP_UTF8)
     {
diff --git a/dlls/ntdll/unix/loader.c b/dlls/ntdll/unix/loader.c
index 19fbfb2b68c..dbf60ccd8b2 100644
--- a/dlls/ntdll/unix/loader.c
+++ b/dlls/ntdll/unix/loader.c
@@ -160,6 +160,7 @@ const char *config_dir = NULL;
 const char **dll_paths = NULL;
 const char **system_dll_paths = NULL;
 const char *user_name = NULL;
+const char *display_user_name = NULL;
 SECTION_IMAGE_INFORMATION main_image_info = { NULL };

/* adjust an array of pointers to make them into RVAs */
@@ -410,17 +411,17 @@ static void set_system_dll_path(void)
     system_dll_paths[count] = NULL;
 }

-
 static void set_home_dir(void)
 {
+    struct passwd *pwd = getpwuid( getuid() );
     const char *home = getenv( "HOME" );
     const char *name = getenv( "USER" );
+    const char *display_name = (pwd == NULL) ? "Wine" : pwd->pw_gecos;
     const char *p;

-    if (!home || !name)
+    if(!home || !name)
     {
-        struct passwd *pwd = getpwuid( getuid() );
-        if (pwd)
+        if(pwd)
         {
             if (!home) home = pwd->pw_dir;
             if (!name) name = pwd->pw_name;
@@ -431,9 +432,9 @@ static void set_home_dir(void)
     if ((p = strrchr( name, '\' ))) name = p + 1;
     home_dir = strdup( home );
     user_name = strdup( name );
+    display_user_name = strdup( display_name );
 }

-
 static void set_config_dir(void)
 {
     char *p, *dir;
diff --git a/dlls/ntdll/unix/unix_private.h b/dlls/ntdll/unix/unix_private.h
index 6cd88a5acc0..26601224619 100644
--- a/dlls/ntdll/unix/unix_private.h
+++ b/dlls/ntdll/unix/unix_private.h
@@ -161,6 +161,7 @@ extern const char *data_dir;
 extern const char *build_dir;
 extern const char *config_dir;
 extern const char *user_name;
+extern const char *display_user_name;
 extern const char **dll_paths;
 extern const char **system_dll_paths;
 extern pthread_key_t teb_key;
diff --git a/dlls/secur32/secur32.c b/dlls/secur32/secur32.c
index f757ea6d34f..ce253e7a647 100644
--- a/dlls/secur32/secur32.c
+++ b/dlls/secur32/secur32.c
@@ -1158,9 +1158,21 @@ BOOLEAN WINAPI GetUserNameExW(
             return FALSE;
         }

+    case NameDisplay:
+        {
+            DWORD len = GetEnvironmentVariableW( L"WINEDISPLAYUSERNAME", lpNameBuffer, *nSize );
+            BOOL ret;
+
+            if (!len) return FALSE;
+            if ((ret = (len < *nSize))) len++;
+            else SetLastError( ERROR_INSUFFICIENT_BUFFER );
+            *nSize = len;
+
+            return ret;
+        }
+
     case NameUnknown:
     case NameFullyQualifiedDN:
-    case NameDisplay:
     case NameUniqueId:
     case NameCanonical:
     case NameUserPrincipal: